Improvement in machines for cutting sheet metal



2 Sheets-#Sheet 2|.v v

J. M. JAY; MACHINE FOR CUTTING SHEET-METAL. N@.17z,879.

Patented Feb. 1, 1876.

NPETERS, FNOT0-L|TMOGWPHER WASHINGTON. D. C.

Strips, of wh-ich the following isv a specification, reference being had to the a'ccom strips or ribbons; and consists of the combibrackets c c, respectively.

the said gage and' pass through holes in said bobbin or reel D near its perimeter, and fur- UNITED STATES PATENT OFFICE.

JAMES M. JAY, or NEw YORK, N. Y., AssIeNoE To HIMsELE AND GEORGE LEsfrEa'oE SAME PLAGE.

IMPROVEMENT iN .MACHINES Fon. CUTTING SHEET METAL.

Specification forming part of vLetters Patent No..172,879, datedFebruary 1, 1876; application led December 22, 1875.

To allwhom it may concern:

Be it known that I, JAMES M. JAY, of the city, county, and State ot' New York, have invented a new and useful Improvement in Machinery for Cutting Thin Metal into 'Narrow' panying drawings forming part of the same.

My invention relates to a machine designed to cut thin metal sheetsv into long narrow nation of devices for the purpose hereinafter particularly described. V

Figure l is an elevation of a machine containing iny improvements, presenting a rear view of the machine. Fig. 2 is a plan, Fig. 3 a front elevation, and Fig. 4 a side elevation, ofthe same.

A is a frame or'hollow pillar, npouwhich the moving parts of my machine are mounted. B B are revolving shear-cutters, mounted on shafts a a, which have their bearings in the head-block G, secured upon the top of the pillar A. b b are spur-gears on the said shafts, whereby the latter are geared to run together.v D is a spool or reel formed of two disks fixed on a shaft, which has itsbearings in a bracket, E, secured upon the head-block C. F is the driving-pulley, fixed 'on the shaft a; and F', a loose pulley. G G are rods designed to support the metal and present it tothe cutters. They. are xedin brackets c c c c, secured upon the head-blocks. These rods are Ahollowiind provided with slotted openings cl d', extending from their outer ends to the H H are pressure-guides, eachhaving a `short shaft or stem extending through the -slots d d', respectively, into the hollow rods G G. To the stems of these guides are Aattached cords, which run through the rods and over pulleys c c at therear ends of the rods, with weights f f' attached to their ends, whereby the guidesare pressed against the outer edge of the -metal while the latter is being cut, thus forcing the metalaga-inst the gage g. In place of the cord and'weights, springs may be used. The gage g is'secured to and made'adjustable on a bar, Y k, by screw-bolts n a', which are fastened to bar, with nuts on either side of it. j is a hinged guide, forked at its outer end to embrace the nished with set-screws l l to adjust the guide accurately to the reel.` It is hinged, as shown in Fig. 2, in order that it may be thrown up out of thc way when the reel is to be'removed from its shaft. 'Motion is given to the `reel or bobbin D from the shaft of the. cutter Bby a band, s, running from a pulley, p, on the latter to a pulley, g, on the shaft ofthe reel.

The sheet of metal intended to vbe cut into a continuousstrip orribbon is bent into the form of a cylinder, and its opposing edgesxsoldered together, so as to form a largev tube. Y

This tube is placed uponthe rods G G', as

seen in Fig. 1, the pressure-guides H H presss ing againstits outer edge, forcing the opposite edge against the gage g; a cut being made into the inner edge of this cylinder, and the strip thus severed'passed by the cutters and wound around the spool, the machine is ready for operation.- Then, when motion is communicated to the drivin g-pulley, itis evident that a continuous strip or ribbon will be cut l spirally around the cylinder until the whole is cut? up and Wound upon the spool D. When a s pool is filled it may be removed, an empty one put in its place, and the operation continued. Y i

This machine is specially designed to cut up zinc sheets into strips to be used in making glazier-tacks in a machine for which an appli lcation for patent was tiled by me March 9, V1875, and passed for issue June 22, 1875.v

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A machine for cutting sheet metal into strips, wherein are combined the cutters B B', the rods 'G G, and the pressureguides H H',

ione or more, constructed to operate as and for f the purpose described.

2. The combination, in a machine for cutting sheet-metal yinto strips, of the spool D and the hinged pose specified.

. 3. The combination, in a machine for cutn ting sheet metal into strips, of the pressureguides H H and the spool D, asand for the purpose specified.

Witness my han ber, 1875.

1 uns 20u1- day of Deten- -J AMES M. JAY..

Witnesses:

B. S. CLARK, JN0. T. OQoNNoR.

guides j, as and for the pur- 

